Abstract: Based on the 2013-edition Journal Citation Report (JCR) issued by Thomson Reuters, we analyzed the main bibliometric indexes of the 165 SCI-covered journals published in Mainland China and Hong Kong Area. Compared with the data of 2012-edition JCR, the average total citation and average impact factor are increased by 17.7% and 10.8%, respectively, which are significantly higher than the corresponding values (8.0% and 3.5%) of the 8474 journals included in JCR. Of the 165 journals, there are 13 and 5 journals in the first quartile (Q1) and top 10% of impact factor partitions, respectively, showing some Chinese SCI journals have relatively higher impact in certain disciplines. We also made a comparative analysis between the 67 journals supported by the project "Plan of Promoting International Influence for Chinese Scientific Journals" and the 83 journals which are not supported by this project.